- 5-Axis sensor-shift image stabilization
- Improved autofocus speed and tracking
- XAVC S video codec, 50Mbps
- S-Log2 picture setting à la Sony A7s
- Redesigned front grip
- Front command dial relocated, à la Nikon
It's also important to also note what hasn't changed:
- 117-point phase-detection and 25 contrast detection AF points: This is the same as the A7. By comparison, the Sony 6000 uses 179 phase detection points.
- Same NP-FW50 battery. For reference, the A7 is rated at 340 shots under the CIPA testing standard
- Rear control cluster is still the same. More about this later
Quite frankly, the inclusion of in-camera image stabilization is enough to get many people excited., given how well the system on the Olympus OM-D E-M1 works. Sony will probably be coy, but its very likely that the a7 II's image stabilization system is descended from Olympus technology, given that Sony acquired part ownership of Olympus after the accounting scandal of 2011.
(First posted November 21st, 2014. Updated November 28 with hands on impressions with a pre-production unit at the 2014 Broadway Camera Black Friday Photo Expo.)